Question 1

What are story points?

Accepted Answer

Story points are a relative unit that combines effort, complexity, and uncertainty to size backlog items in agile development. They help teams estimate work without committing to specific time estimates, encouraging discussion and reducing optimism bias. One story point typically represents the effort of a small, well-understood task.

Question 2

Why use the Fibonacci sequence?

Accepted Answer

The Fibonacci sequence (1, 2, 3, 5, 8, 13, 21, 34, 40, 100) is used because the gaps between numbers widen as values grow, mirroring increasing uncertainty for larger pieces of work. This prevents false precision and encourages teams to break down large tasks into smaller, more estimable pieces.

Question 3

How do I calculate story points for a task?

Accepted Answer

Use a weighted approach: complexity (35%), effort (30%), risk/uncertainty (20%), and dependencies (15%). Input your ratings (1-5 scale) into the calculator, and it will suggest a Fibonacci value. Remember: story points represent relative effort, not time. A 5-point task isn't necessarily twice the time of a 3-point task.

Question 4

What's the difference between story points and hours?

Accepted Answer

Story points estimate relative effort, while hours estimate actual time. Story points account for complexity, uncertainty, and risk that hours often miss. A 3-point task might take 2 hours for one developer and 6 hours for another, but both would agree it's 3 points. This makes story points more reliable for sprint planning and velocity tracking.

Question 5

How do I estimate story points in a team?

Accepted Answer

Use Planning Poker: each team member privately selects a point value, then all reveal simultaneously. Discuss discrepancies and reach consensus. Start with a baseline task (assigned 3 points), then compare other tasks to it. The calculator's output should be a starting point for discussion, not a final answer.

Question 6

Can I use different scales instead of Fibonacci?

Accepted Answer

Yes! Teams can use T-shirt sizes (S, M, L, XL), powers of 2 (1, 2, 4, 8, 16), or custom scales. Fibonacci is popular because it naturally represents increasing uncertainty. The key is consistency - once you choose a scale, stick with it across all estimates for accurate velocity tracking.

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